When big L was this age, I was working, quite a bit. More than I wanted to, but it was necessary. I don't remember watching her learn to communicate the way I can with little l.
Little l is pointing, her way of saying, "what is that", or "i know what that is!". Today for the first time she told me she wanted a nap. Not normally something she volunteers for, but she laid down on the floor, wiggled around and cried until I laid her in the crib.
Babies are amazing.